Also, most usb flash drives are marked optimize for quick removal so there is no need to safely remove device as long as you aren't reading/writing to it at the time of removal.
For USB hard drives, the default is also quick removal.
For USB hard disks, the user may want to enable write caching to improve perfornace. This setting also requires safe removal
Use the device manager Disk drives, while the drive is plugged in, and then properties, then click the policies tab.
If the drive is optiimized for quick removal
no problem, but if it's optimized for performance
safe removal is important.